The protein tyrosine phosphatase SHP-2 is expressed in glial and neuronal progenitor cells, postmitotic neurons and reactive astrocytes.
In this study we examined the distribution and developmental profile of the src homology 2 (SH2) domain-containing protein tyrosine phosphatase SHP-2 in the mouse brain. We found that SHP-2 is present in both mitotically active and postmitotic cells in the forebrains of embryonic day 12 (E12) mice. In a developmental study extending from embryonic day 12 to adulthood, Western blotting analysis demonstrated equivalent levels of SHP-2 protein at all of the ages examined. Expression of SHP-2 paralleled the level of enzymatic activity at the different developmental periods. In the adult brain SHP-2 was restricted to diverse classes of neurons, while the majority of glial cells did not express detectable levels of protein. However, reactive astrocytes in response to an ischemic brain injury showed SHP-2 immunolabelling. Our data suggest that SHP-2 may play a role in pathways of neuronal and glial progenitor cells, in a broad spectrum of neuronal responses in the adult brain and in the gliotic response to the injury.
Servidei
T
T
Molecular Neuro-Oncology, Neurological Service, Massachusetts General Hospital and Harvard Medical School, Charlestown 02129, USA.
Bhide
P G
PG
Huang
Z
Z
Moskowitz
M A
MA
Harsh
G
G
Reeves
S A
SA
D000818:Animals; D000963:Antimetabolites / Q000494:pharmacology; D001253:Astrocytes / Q000201:enzymology*; D015153:Blotting, Western; D001921:Brain / Q000166:cytology / Q000254:growth & development; D002545:Brain Ischemia / Q000201:enzymology; D001973:Bromodeoxyuridine / Q000494:pharmacology; D005260:Female; D007150:Immunohistochemistry; D047908:Intracellular Signaling Peptides and Proteins; D008297:Male; D051379:Mice; D008938:Mitosis; D009457:Neuroglia / Q000201:enzymology*; D009474:Neurons / Q000201:enzymology*; D054592:Protein Tyrosine Phosphatase, Non-Receptor Type 11; D053824:Protein Tyrosine Phosphatase, Non-Receptor Type 6; D017027:Protein Tyrosine Phosphatases / Q000096:biosynthesis*; D054593:SH2 Domain-Containing Protein Tyrosine Phosphatases; D013234:Stem Cells / Q000201:enzymology
D000963:Antimetabolites; D047908:Intracellular Signaling Peptides and Proteins; D054592:Protein Tyrosine Phosphatase, Non-Receptor Type 11; D053824:Protein Tyrosine Phosphatase, Non-Receptor Type 6; D017027:Protein Tyrosine Phosphatases; C516725:Ptpn11 protein, mouse; C509248:Ptpn6 protein, mouse; D054593:SH2 Domain-Containing Protein Tyrosine Phosphatases; D001973:Bromodeoxyuridine